Refined model of stiffened shells

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:199

Article

Karpov, V. V.¹  Semenov, A. A.¹ 

[1] St Petersburg State Univ Architecture & Civil Eng, Informat Technol, 4,2nd Krasnoarmeyskaya St, St Petersburg 190005, Russia

关键词: Shells;    Buckling;    Mathematical model;    Stiffened ribs;   

DOI  :  10.1016/j.ijsolstr.2020.03.019

来源: Elsevier

【 摘 要 】

The paper addresses several existing versions of mathematical models describing stiffened shell structures (accounting for the interaction between stiffeners and skin along a line, and along a strip, and a method for smearing the stiffness of stiffeners over the entire structure). The authors suggest a new, most accurate version to account for stiffness properties of stiffeners, based on introducing various modular ratios along various coordinate axes. For stiffeners perpendicular to the direction under consideration, the authors introduce a modular ratio equal to the ratio between the width of stiffeners in this direction and the linear dimension of the shell in the direction under consideration. For analysis, the authors use an algorithm based on the Ritz method and the best parameter continuation method. Three versions of models, taking into account the discrete introduction of stiffeners, are compared. Analysis is performed for isotropic shallow doubly curved shells reinforced with an orthogonal grid of stiffeners. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free